Boring-tool holder



Aug. ze 1924. 1,506,634

L. SWANSON BORING TOOL HOLDER Filed Aug. 19, 1920 20 www ||||||1H l I|Il y i7 f l jig ff /0 l, Af 21\ i 5A lm. .20- 5 l 8*- n; H 9

.1 W L FJ z I l j@ jm/vanto@ i/Lw wamsn @51g l Patented Aug. 26, 1924.

PATENT OFFICE.

LUDWIG SVJANSON, OF DETROIT, MICHIGAN.

BORING-TOOL HOLDER.

Application filed August 19, 1920.

To all whom it may concern:

Be it known that I, LUDWIG SwANsoN, a citizen of the United States ofAmerica, residing at Detroit, in the county of l/Vayne and State ofMichigan, havel invented certain new and useful Improvements in Boring-Tool Holders, of which the following is a specification, referencebeing had therein to the accompanying drawings.

This invention relates to devices for adjustably holding boring bars andsimilar tools and its objectis to provide simple means whereby a tool ofthis character may be rigidly held and quickly adjusted toward and fromits support and angular-ly thereon. A further object is to provide aconstruction which is cheap to manufacture, and has other new and usefulfeatures, all as herein after more fully described.

Vith the foregoing and other ends in view, the invention consists in thematters hereinafter set forth and more particularly pointed out in theappended claims, reference being had to the accompanying drawing inwhich-- Figure 1 is a perspective view of a device illustrative of theinvention; and

Fig. 2 a transverse section through the same.

In the drawings 1 in-dicates a boring bar or similar cutter holder whichmay have any desired construction, it being preferably cylindrical inform and carrying a cutting tool 2 at one end. This bar is mounted in asuitable holder or clamp, indicated as a whole at 3, which clampconiprises a horizontally split body having an eye 4 provided with abore to receive a sleeve 5, the slit 6 which severs the body, extendinginto the bore of the eye at one side to divide or sever the eye so thatthe eye will yield to iirmly clamp the sleeve which is preferablyeccentric, that is the bore of the sleeve is oii-center so that saidsleeve is thicker at one side than at the other. The bar 1 fits closelyin the bore of the sleeve and is secured lirnily therein in any suitablemanne-r to rotate therewith and one end of this eccentric sleeve isprovided with a notched iiange 7, the notches of which are adapted to beengaged by a suitable member such as a screw 7a, tapped into the clampbody for holding the sleeve and bar against turning. By removing thisscrew the sleeve with the bar may be turned within the eye of the clampand by reason of the Serial N0. 404,565.

eccentricity of the sleeve, the bar willv be adjusted relative to theclamp.

The body 8 of the clamp comprises a member which is preferably ofcircular forni bored out vertically to provide a hollow body with whichthe eye portion 4 of the clamp is connected by integral neck portions 9and 10 at each side of the slit 6. At the upper and lower ends or facesof this cylindrical body 8, said ends are formed with annular grooves 11forming seats for disks 12 which are free to turn in these seats. Eachdisk is provided with two diametrically opposed notches 13 in theopposite edges of the disks to receive clamping bolts 14 by means ofwhich the clamp may be secured to the bed or table of a metal workingmachine to which the tool is adapted to be attached. This table or bedis indicated in dotted lines in F ig. 2 by 'the numeral 15 and isprovided with an under-cut groove 16 to receive the squared heads 17 ofthe bolts. The upper ends of these bolts are screw-threaded and providedwith a nut 18 and interposed between the nut and the upper disk 12 is awasher 19 which is of such diameter that a portion thereof will overliethe edge of the body 8 and the washer will cover the notch in the diskthro-ugh which the bolt extends..

The annular grooves 11 are of such a depth that the outer faces of thedisks will lie in the plane of the ends of the body so that when theclamp is secured in place the lower end of the body and the lower diskwill lie flat upon the table and the washers 19 will lie flat upon theupper rim of the body and the upper disk. rlherefore, by tightening thenuts 18 Vthe clamp is securely held in place upon the table or bed andat the same time the two parts into which the clamp is divided by theslit t3 are drawn toward each other to firmly clamp the boring bar andits eccentric sleeve.

To prevent the divided parts of the body from being drawn by the bolts14 toward each other with such force that the eye is liable to be brokenbefore the heads of the bolts are drawn into su'liicient contact withthe groove in t-he table 15 to hold the clamp in place, the two parts ofthe body at each side of the slit 6 are formed with opposed ears 2O andthe upper ears of the two pairs are provided with screw-threadedopenings to receive set screws 21 which are adapted to engage the lowerears and prevent the two parts of the body from approaching each other,said set screws being adjustable to permit sufficient springing of thedivided body to give the proper clamping effect upon the eccentricsleeve and prevent rotation of the boring bar under heavy strains.

By the arrangement of the clamping bolts 14 passing through the disks inthe hollow body, said body may be 'freely rotated about the verticalaxis of the boie ot the body to adjust the boring bar to the work andthese bolts form holding means tor securely :tastening the clamp to themachine bed, providing a much more rigid attachment than would beafforded by a single bolt passing through the axis ot the body 8.

By providing the eccentric sleeve 5 or holder for the tool, whicheccentric may be in the form of a Sleeve, as shown or may be an integralpart of' the boring` bar, said bar or tool may be adjusted relative tothe clamp and by attaching the clamp to the machine bed in'such a mannerthat it may be swung about 'a vert-ical axis, the clamp and tool may bereadily adjusted about such center t0 bring the tool into properrelation with the work.

Obviously, other changes may be made in the form and construction of theclamp within the scope of the appended claims without departing from thespirit of my invention, and I do not, therefore, limit myself 4'tc `theparticular' construction shown.

Having thus fully described my invention.y what I claim is l. A deviceof the character described comprising a hollow body with the opening inthe body extending vertically therethrough, said body being formed witha laterally extending portion providing a tool holding` eye with theaxis oi'' the eye extending at right angles to the opening through thebody, and said body being divided horizontally with the dividing slitextending into the bore of the eye, a circular member seated within thebody to permit rotation orl the body relative thereto about a verticaland a plurality ot securing members extending through the circularmember in spaced relation to Secure said member against ro tation upon asupport.

2. A device or the character described ir.- cludiiig a hollow bodyprovided with tool holding means, a circular member seated in saidhollow body to hold said body in plat-.c thereon and to permit rotationof said body., and a yplurality ot' spaced apart securing members, meanspassing through the cir-eular member for holding said member againstrotation and securing' the same to a support.

3. A device ot the character described, comprising a hollow body andlaterally ei:- tending portion bored to form a tool receivsecuringmembers passing vertically through.

said member and hollow body for securing the body to a support.

5. A device as characterized in claim 4,

wherein the upper and lower'di-vided parts ot the body are formed withprojecting ears, the car on one part being formed with a screwthreadedopening, and a set screw in said opening to engage the ear on the otherpart.

6. A device of the character described comprising a hollow body open atits upper and lower ends and formed with a laterally extending portion:termed to receive' a tool, said body being split horizontally into thelaterally extending portion to clamp the tool therein upon the drawingot the divided portions ot the body toward each other, said body beingalso formed at its ends with annular seats surrounding the openings inthe ends ot the body, disks seated insaid seats, and securing boltspassing vertically through the hollow body and through said disks.

7. A device ot the character described comprising a cylindrical shapedbody having an integral laterally extendingportion provided with ahorizontal bore forming an eye to receive a tool, said body beingsplittransversely with said split open into the bore of the eye to 'form asplit clamping eye, said body being also formed with later lly extendingears on the divided portions olf the body, the ear on one portion beingtorined with a screw-threaded opening to receive a set screw to engagethe ear on the other portion, members seated in the ends ot thecylindrical body and closing the same and adapted to rotate thereinrelative to the body, and headed securing bolts passing verticallyVthroughthe bore o'l the cylinrical body and through said members tosecure the body to a support and to provide mea-ns for drawing thedivided parts of the body toward each other to clamp a tool in the toolholding eye.

ln testimony whereotl l altix my signature in presence olf twowitnesses.

' LUDNG SVVANSON.

l/Vitnesses ANNA M. Donn, KARL H. BUTLER.

